New satellite images of the Tonopah Test Range in Nevada have spurred the interests of conspiracy theorists and aviation nerds alike, thanks to what appears to be a blurred out portion of a secret aircraft sticking out of one of the hangars. Simply censoring a small portion of satellite images of a military installation alone may not have been enough to get the internet’s mouth watering, but the Tonopah Test Range has a long and illustrious history of harboring secret military aircraft within its expansive hangars — from the F-117 Nighthawk (long before it was acknowledged by the U.S. government; sometimes called the Stealth Fighter) to secret Soviet Migs used for testing.

It also happens to be a part of the massive Nellis Range — a huge stretch of territory used for all sorts of military purposes, including housing an installation which popular culture has taken to calling “Area 51.”

These new images compound previous satellite pictures confirming the construction of a new large-scale hangar at the above-mentioned “Area 51” from last year, begging the question: what kind of secret aircraft is the Defense Department testing out in Nevada?

These side by side images of the “Area 51” facility show the recent addition of a large hangar and taxi strip. (Google Earth)

By their very nature, these secretive projects are, well, a secret — but there are some clues floating around the veritable sea of government contracts and defense technology firms. Here are just some of the aircraft that are currently rumored to be under development or even already in testing. Some of these programs are publicly acknowledged, while others are the products of informed speculation… but all seem like potential tenants for these highly secretive hangars.

Lockheed Martin SR-72

Lockheed Martin

The SR-71 Blackbird remains the fastest operational military aircraft the world has ever seen, with a top speed that exceeded Mach 3. Today, Lockheed Martin is already working on a worthy successor for the nameplate in the form of the SR-72 project: a ramjet-powered aircraft that aims to achieve and maintain hypersonic speeds — or speeds in excess of Mach 5. Currently, only missiles have managed to operate at that velocity.  It’s no secret that this aircraft (which would almost certainly be unmanned because of the speeds at which it would travel) is under development at Lockheed Martin… but what really got the attention of internet sleuths were remarks made by Lockheed’s Vice President, Jack O’Banion, late last year. O’Banion showed an artist’s concept of the SR-72, and then said this:

Without the digital transformation, the aircraft you see there could not have been made. We couldn’t have made the engine itself — it would have melted down into slag if we had tried to produce it five years ago. But now, we can digitally print that engine with an incredibly sophisticated cooling system integral into the material of the engine itself, and have that engine survive for multiple firings for routine operation.”

That language certainly does make it seem like Lockheed Martin has already built at least a technology demonstrator for their SR-72 concept — a demonstrator that’s got to fly out of somewhere if it does exist.